A Feasibility Study to Evaluate Safety and Initial Effectiveness of ExAblate Transcranial MR Guided Focused Ultrasound Treatment of Medication-Refractory OCD
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Medication-refractory Obsessive Compulsive Disorder (OCD)
- Sponsor
- InSightec
- Enrollment
- 25
- Locations
- 1
- Primary Endpoint
- Effectiveness of the ExAblate Transcranial MRgFUS treatment of medication-refractory OCD
- Status
- Completed
- Last Updated
- 6 years ago
Overview
Brief Summary
The goal of this prospective, non-randomized, single-arm, single site, feasibility study is to develop and collect data to evaluate the safety and initial effectiveness of this treatment using this ExAblate transcranial System in the treatment of Medication-Refractory OCD.
Detailed Description
The purpose of this study is to evaluate the safety and initial effectiveness of MRI-guided focused ultrasound thermal ablation of a designated area in the brain of patients suffering from medication-refractory OCD, using the ExAblate transcranial system. The ExAblate system is a medical device that involves a focused ultrasound system and an MRI scanner. ExAblate delivers a pulse of focused ultrasound energy, or sonication, to the targeted tissue. For OCD Patients: one or more thermal lesion will be created on one of the following targets: Anterior cingulate cortex, Anterior Limb of internal Capsule, Ventral Striatum or Subgenual Cingulate Cortex. The treatment begins with a series of standard diagnostic MR images to identify the location and shape of tumor to be treated. The ExAblate computer uses the physician's designation of the target volume to plan the best way to cover the target volume with small spots called "sonications". These treatment spots are cylinder shaped. Their size depends on sonication power and duration. During the treatment, a specific MR scan, which can be processed to identify changes in tissue temperature, provides a thermal map of the treatment volume to confirm the therapeutic effect. The thermal map is used to monitor the treatment in progress, and confirm that the ablation is proceeding according to plan, thus closing the therapy loop. The ExAblate transcranial operates a helmet-shaped transducer (currently utilizing 1000-element phased array transducer) positioned above the subject head. The ExAblate transcranial system also includes means to immobilize the subject head, cool the interface water, and software for CT analysis and phase correction computation. After informed consent and screening, eligible subjects will proceed to the treatment. All subjects will be followed at Day 1, 7 days, 1 month, 6 months and 1, 2 and 3 years. At follow up visits, patients will be evaluated for general health, neurological changes (including MMSE exam),and efficacy measurements as well as for device/procedure related adverse events that may have occurred during the follow-up period. Six (6) month and 1, 2 and 3 year follow up visits will also include Full Battery Cognitive/Neurological Testing.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Men and women, between 18 and 65 years, inclusive
- •Subjects who are able and willing to give consent and able to attend all study visits
- •OCD refractory to adequate trials of medication and behavioral therapy by psychiatrist (more than 12 weeks at the maximum tolerated dose with more than two types of serotonin reuptake inhibitors).
- •Designated Ablation Targets can be target by the ExAblate device. Designated Ablation Targets must be apparent on MRI such that targeting can be performed with direct visualization.
- •Able to communicate sensations during the ExAblate MRgFUS treatment
- •Definitive diagnosis of OCD, according to the criteria of the Diagnostic and Statistical Manual of Mental Disorder fourth edition (DSM-IV), with disease duration of more than 3 years, with diagnosed psychosocial dysfunction. (The diagnosis of OCD would be done by psychiatrist)
- •A score on the Y-BOCS of more than
- •OCD medication regimen is stable for at least 30 days before enrolment
- •Patients with diagnosed psychosocial dysfunction influenced by OCD
Exclusion Criteria
- •Patients with unstable cardiac status including:
- •Unstable angina pectoris on medication
- •Patients with documented myocardial infarction within last 40 days to protocol entry
- •Congestive heart failure NYHA Class IV
- •Patients exhibiting any behavior(s) consistent with ethanol or substance abuse as defined by the criteria outlined in the DSM-IV as manifested by one (or more) of the following occurring within a 12 month period:
- •Recurrent substance use resulting in a failure to fulfill major role obligations at work, school, or home (such as repeated absences or poor work performance related to substance use; substance-related absences, suspensions, or expulsions from school; or neglect of children or household).
- •Recurrent substance use in situations in which it is physically hazardous (such as driving an automobile or operating a machine when impaired by substance use)
- •Recurrent substance-related legal problems (such as arrests for substance related disorderly conduct)
- •Continued substance use despite having persistent or recurrent social or interpersonal problems caused or exacerbated by the effects of the substance (for example, arguments with spouse about consequences of intoxication and physical fights).
- •Severe hypertension (diastolic BP \> 100 on medication)
Outcomes
Primary Outcomes
Effectiveness of the ExAblate Transcranial MRgFUS treatment of medication-refractory OCD
Time Frame: Participants will be followed from the date of treatment until study completion, up to 36 months
Effectiveness of the ExAblate Transcranial MR-guided Focused Ultrasound (MRgFUS) treatment of medication-refractory OCD will be determined using the Yale-Brown Obsessive-Compulsive Disorder Scale (Y-BOCS), Hamilton Depression Rating Scale (HAM-D), and Hamilton Anxiety Rating Scale (HAM-A) from examinations at baseline and through 6-Months post-ExAblate treatment.
Secondary Outcomes
- Device or procedure related Adverse Events reported(36 month)